Upper rail for use in curtain



FIG. 1 is a perspective view of a upper rail for use in curtain showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The design is shown broken away near its center in order to indicate that a specific length of upper rail for use in curtain forms no part of the claimed design. 

CLAIM The ornamental design for an upper rail for use in curtain, as shown and described. 